Hello, I'm sorry if this was already addressed somewhere else, but if it was I couldn't find it.
Anyway, I was wondering if it would be possible to turn off the cave map on one of my worlds (This one). Its an active survival mode server, and there is some secret stuff underground that people are not supposed to see (especially if I was to get a new version rendered).

Unfortunately this cannot currently be done. Removing a render of your map could lead to many issues, along with potential corruption. In the future a feature to toggle view types may be added. However, we usually need a vast majority of users wanting it to be added to spend the time to add it.